PCI Express To PCI Bus Translation Bridge With 1394a OHCI And Two-Ports

The XIO2200A is a single-function PCI Express to PCI translation bridge where the PCI bus Interface is internally connected to a 1394a open host controller link-layer controller with a two-port 1394a PHY The PCI-Express to PCI translation bridge is fully compatible with the PCI Express to PCI PCI-X Bridge Specification, Revision 1.0. Also, the bridge supports the standard PCI-to-PCI bridge programming model. The 1394a OHCI controller function is fully compatible with IEEE Standard 1394a-2000 and the latest 1394 Open Host Controller Interface (OHCI) Specification.
For downstream traffic, the PCI Express to PCI translation bridge simultaneously supports up to eight posted and four nonposted transactions for each enabled virtual channel (VC). For upstream traffi 12fc c, up to six posted and four nonposted transactions are simultaneously supported for each VC.
The PCI Express Interface supports a 1 link operating at full 250 MB/s packet throughput in each direction simultaneously. Two independent VCs are supported. The second VC is optimized for isochronous traffic types and quality-of-service (QoS) applications. Also, the bridge supports the advanced error reporting capability including ECRC as defined in the PCI Express Base Specification, Revision 1.0a. Supplemental firmware or software is required to fully utilize both of these features.
Robust pipeline architecture is implemented to minimize system latency across the bridge. If parity errors are detected, then packet poisoning is supported for both upstream and downstream operations.
Deep FIFOs are provided to Buffer 1394 data and accommodate large host bus latencies. The bridge provides physical write posting and a highly tuned physical data path for SBP-2 performance. The bridge is capable of transferring data between the PCI Express bus and the 1394 bus at 100M bits/s, 200M bits/s, and 400M bits/s. The bridge provides two 1394 ports that have separate cable bias (TPBIAS). The bridge also supports the IEEE Std 1394a-2000 power-down features for battery-operated applications and arbitration enhancements.
As required by the 1394 Open Host Controller Interface Specification1394 and IEEE Std 1394a-2000, internal control Registers are memory-mapped and nonprefetchable. This configuration header is accessed through configuration cycles specified by PCI Express, and it provides plug-and-play (PnP) compatibility.
The PHY-layer provides the digital and Analog transceiver functions needed to implement a two-port node in a cable-based 1394 network. Each cable port incorporates two differential line transceivers. The transceivers include circuitry to monitor the line conditions as needed for determining connection status, for initialization and arbitration, and for packet reception and transmission. An external 2-wire serial EEPROM Interface is provided to load the global unique ID for the 1394 fabric.
Power management (PM) features include active state link PM, PME mechanisms, the beacon and wake protocols, and all conventional PCI D-states. If the active state link PM is enabled, then the link automatically saves power when idle using the L0s and L1 states. PM active state NAK, PM PME, and PME-to-ACK messages are supported.
Eight general-purpose inputs and outputs (GPIOs), configured through accesses to the PCI Express configuration space, allow for further system control and customization.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
XIO2200AZGW Texas Instruments x1 PCI Express to 1394a OHCI and 2-Port PHY 176-BGA MICROSTAR
XIO2200AZHH Texas Instruments x1 PCI Express to 1394a OHCI and 2-Port PHY 175-BGA MICROSTAR
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